4 * This file is part of BeRTOS.
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14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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29 * Copyright 2005, 2008 Develer S.r.l. (http://www.develer.com/)
34 * \author Bernie Innocenti <bernie@codewiz.org>
35 * \brief Low-level timer module for Qt emulator (implementation).
37 #include <cfg/compiler.h> // hptime.t
38 #include <os/hptime.h>
40 #include <signal.h> // sigaction()
41 #include <sys/time.h> // setitimer()
42 #include <string.h> // memset()
45 // Forward declaration for the user interrupt server routine.
48 /// HW dependent timer initialization.
49 static void timer_hw_init(void)
52 irq_register(SIGALRM, timer_isr);
53 #else // ! CONFIG_KERN_IRQ
55 memset(&sa, 0, sizeof(sa));
57 // Setup interrupt callback
58 sa.sa_handler = timer_isr;
59 sigemptyset(&sa.sa_mask);
60 sigaddset(&sa.sa_mask, SIGALRM);
61 sa.sa_flags = SA_RESTART;
62 sigaction(SIGALRM, &sa, NULL);
63 #endif // CONFIG_KERN_IRQ
65 // Setup POSIX realtime timer to interrupt every 1/TIMER_TICKS_PER_SEC.
66 static const struct itimerval itv =
68 { 0, 1000000 / TIMER_TICKS_PER_SEC }, /* it_interval */
69 { 0, 1000000 / TIMER_TICKS_PER_SEC } /* it_value */
71 setitimer(ITIMER_REAL, &itv, NULL);
74 static void timer_hw_cleanup(void)
76 static const struct itimerval itv =
78 { 0, 0 }, /* it_interval */
79 { 0, 0 } /* it_value */
81 setitimer(ITIMER_REAL, &itv, NULL);
84 INLINE hptime_t timer_hw_hpread(void)
89 #define timer_hw_triggered() (true)